package com.itheima.zhujie;

public class Demo01 {
    public static void main(String[] args) {
        Zi zi = new Zi();
        zi.show();
    }

}
class Fu{
    public  void sing(){
    }
}
@SuppressWarnings(value = "all")
class Zi extends Fu{
    @Override
    public void sing() {
        super.sing();
        show();
    }
    @Deprecated
    public void show(){

    }
}